Journal of anesthesia
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Journal of anesthesia · Sep 1987
Tracheal tube cuff pressure--study on tube size and inflating gases.
The effect of nitrous oxide on the cuff pressure was studied from the following points of view. One was the size of tubes and the type of cuff. The other was the effects of different gas mixture in the cuff. ⋯ In the group of air, the cuff pressure increased as well as experiment I. However in the group of mixtured gas, there were almost no changes in the cuff pressure. This means that if the cuff is inflated with a mixtured gas in which nitrous oxide is under the equivalent condition, the cuff pressure would not change.
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Journal of anesthesia · Mar 1987
Spread of epidural analgesia following a constant pressure injection--an investigation of relationships between locus of injection, epidural pressure and spread of analgesia.
(1) The spread of epidural analgesia following injection of 15 ml of 2% mepivacaine was 17.3 +/- 0.6, 14.3 +/- 0.4, and 13.3 +/- 0.7 spinal segments in cervical, thoracic, and lumbar epidural analgesia, respectively. The patient's age showed significant correlation with the spread of epidural analgesia in cervical (r = 0.5776, p < 0.001), thoracic (r = 0.3758, p < 0.01), and lumbar area (r = 0.8195, p < 0.001). ⋯ The lower epidural pressure associated with higher age, the wider spread of analgesia. There was no significant correlation between the residual pressure at 60 seconds and the age or the spread of analgesia.